Sienna Miller is upset that nude photos of her from her latest movie were leaked online and in the British Press. She is upset that they did not give her more protection to protect her from the photos being taken and leaked. According to
The Sun she is making a stance because of the leak:
“Sienna was really hurt. She took some persuading to do the scenes and spent most of the day in her dressing gown building up to it.
“She is reluctant to do the rest of her nude scenes.”
If that happened in America, SAG would have closed that set down. I can't say I blame her for being upset they should have protected her better.